I honestly can't remember. In the past we've left cars for a week or so at a station, but due to COVID I don't think we have with this one - perhaps 3 days at the most. It's normally used daily, occasionally perhaps a couple of days between uses. Our regular journey, when we do use it, is about 6 miles. Obviously there's the occasional longer trip.

Edited by Mike H on 05/07/2023 at 21:30

Usually problems are caused by lack of use..

Of the 5,120 petrol hybrids registered in 2022 and advertised for sale on Autotrader,1,676 had done less than 5,000 miles That is 32%

106 had covered under 500 miles.

Conclusion: many hybrid users would be better off using a taxi

Do you have 12V battery reset button?

Some hybrids have this button to charge 12V battery from the main traction battery when 12V battery dies. It starts the car using traction battery and then charges 12V again from engine.

Kia offers this in HEV cars but not in PHEV cars.

It happens to EVs as well.

Absolutely dead: 12V battery useless .Lack of use,

Or low voltage and lots of spurious error codes stopping it running.

No 12V battery = no go.

Yep EVs too. Invariably the actual fault is in the circuitry keeping the 12v battery charged. But people just treat the symptom, recharging the 12v battery or putting a new one in. Then complain about repeated problems.

I think I see a pattern....

Please explain people. Do you mean the dealers of private owners DIYing. Whatever poor design on these cars if the 12v battery drains all the time and you can't park them "5minutes" before they flatten.

I have a Yaris cross that’s only three weeks old, I’m hoping that any issues have been resolved, but before this car I had a mild hybrid ford puma, although I never experienced a flat battery, it did have battery problems, message would often appear on the screen telling me the car was in deep sleep mode, many others on the forum had this issue some even actually having a flat battery, a few had their batteries swapped for varta ones, some found it cured the problem, for others it made no difference, the battery would shut down certain systems, one being not letting you open the passenger door ( keyless) some had the parking sensors alter their tones, mine had a complete new engine fitted for an unrelated fault and they replaced/updated several modules, which seemed to cure it as I never got the deep sleep message again, although I suspect they just removed it from the app, and the screen in the car, seems this is a problem that’s affecting quite a few manufacturers…

How much Yangben ?

If you bother to RTFM, you'll find that by leaving it in 'ready' mode, the engine will start now and then to re-charge both batteries.

Toyota do recommend using "ready" mode every week if you don't regularly use the car but there are issues for most mortals. To be in ready mode the car needs the keys in it which in todays world would probably end in theft and no payout. With the engine starting and stopping doing it in the garage is not an option.

From an environmental viewpoint it totally spoils the idea of an economical hybrid.

We got our Yaris on Wednesday. If the issue rears its ugly head I will charge it using the smart charger every week or so and if necessary use the booster (very handy for the Caterham when the battery gets past 6 or 7 years old). There is a dedicated live in the fuse box for these uses.